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Gattinger's Prairie-clover,
Dalea gattingeri
Calyx loosely hairy, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
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Crown-vetch,
Securigera varia
Calyx glabrous, upper 2 lobes more or less united, lower 3 lobes separate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Heartleaf Tick-trefoil,
Hylodesmum glutinosum
Calyx about 2mm, lobes shorter than the tube, per Native and Naturalized Leguminosae (Fabaceae) of the United States (Isely, 1998).
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Fewflower Tick-trefoil,
Hylodesmum pauciflorum
Calyx densely uncinulate-puberulent; petals white, 5-7mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Roundleaf Tick-trefoil,
Desmodium rotundifolium
Calyx sparsely pilose to puberulent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Smooth Tick-trefoil,
Desmodium laevigatum
Calyx densely puberulent & 2-lipped, upper lip scarcely bifid, lower 3-dentate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Velvety Tick-trefoil,
Desmodium viridiflorum
Calyx sparsely to densely short-pubescent. Pedicels 2.5-8mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Bicolor Lespedeza,
Lespedeza bicolor
Calyx sparsely to densely strigilose, lobes 2.5-4.5mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Velvety Lespedeza,
Lespedeza stuevei
Calyx lobes shorter than fruit; legumes elliptic to ovate, notably reticulate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Hairy Bush-clover,
Lespedeza hirta +
Hairy calyx lobes much longer than the petals, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
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Hairy Bush-clover,
Lespedeza hirta +
Legume 5-8mm long, shorter than the lobes of the long calyx, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
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Round-headed Lespedeza,
Lespedeza capitata
Calyx usually conspicuously longer than fruit, lobes lance-linear, subulate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Common Bristly Locust,
Robinia hispida var. hispida
Peduncles, rachises & pedicels more or less hispid; calyx hispid, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Dwarf Bristly Locust,
Robinia nana
Woody stems glabrous, but fine hairs on the new stems and the calyx. — Will Stuart
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Virginia Goat's Rue,
Tephrosia virginiana
Calyx usually densely pillose or villous, occasionally strigose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Spiked Hoary-pea,
Tephrosia spicata
Calyx 6-7mm long, sparsely to more typically dense pilose or villous, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Sandhill Milkvetch,
Astragalus michauxii
Calyx lobes deltoid to narrowly triangular-lanceolate [not subulate], per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Bigflower Vetch,
Vicia grandiflora
Calyx lobes 1/3-1/2 as long as the spreading short-pubescent calyx tube, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Bigflower Vetch,
Vicia grandiflora
Calyx lobes more or less equal and all shorter than calyx tube, per Weakley's Flora.
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Narrowleaf Vetch,
Vicia sativa ssp. nigra
Corolla 10-18mm long, pink-purple to whitish; calyx 7-11(-12)mm long, per Weakley's Flora.
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Narrowleaf Vetch,
Vicia sativa ssp. nigra
Calyx glabrous to sparsely short-pubescent, calyx lobes linear-lanceolate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Smooth Vetch,
Vicia villosa ssp. varia
Calyx lobes unequal: upper 0.5mm or less, lowermost and longest 1-2mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Smooth Vetch,
Vicia villosa ssp. varia
Calyx tube decidedly gibbous [one-sidedly enlarged] at base on upper side, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Slender Vetch,
Vicia tetrasperma
Calyx lobes unequal: upper about 0.2mm, lowermost and longest up to 1-1.5mm, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Carolina Vetch,
Vicia caroliniana
Calyx densely short-pubescent, nearly regular, lobes triangular, subequal, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Everlasting Pea,
Lathyrus latifolius
Calyx glabrous, tube campanulate, lobes lanceolate to linear-lanceolate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Climbing Butterfly-pea,
Centrosema virginianum var. virginianum
Calyx tube broadly hemispheric; lobes linear-subulate, the lowermost longest, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Butterfly-pea,
Clitoria mariana var. mariana
The calyx has a long tube and shorter lobes (vs. the opposite in Centrosema), per Wildflowers of the Southern Mountains (Smith, 1998).
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Annual Sand Bean,
Strophostyles helvola
Bracteoles (immediately subtending calyx) equal or exceed the calyx tube, per Weakley's Flora.
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American Hog-peanut,
Amphicarpaea bracteata +
Calyx narrowly campanulate, tube 4-6mm long, upper 2 lobes united or nearly so, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Chalk Maple,
Acer leucoderme
Calyx tube campanulate, greenish-yellow, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Painted Buckeye,
Aesculus sylvatica
Stamens are shorter than lateral petals, & the calyx & pedicel lack glands, per Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007).
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Red Buckeye,
Aesculus pavia var. pavia
Glandular-hairy tubular calyx. Usually 7 unequal, slightly exserted stamens, per Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007).
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Yellow Buckeye,
Aesculus flava
Calyx tomentose, glandular hairy, per Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007).
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Virginia Creeper,
Parthenocissus quinquefolia
Tiny flowers have 5 yellowish-green petals & a red calyx, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
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Muscadine,
Muscadinia rotundifolia var. rotundifolia
Calyx usually without lobes; petals falling at anthesis, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Possum Grape,
Vitis baileyana
Calyx usually without lobes, petals falling at anthesis, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Porcelain-berry,
Ampelopsis glandulosa
Calyx saucer-shaped, lobes usually obsolete. Petals separate, greenish-yellow, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Marsh Mallow,
Malva moschata
Calyx lobes triangular, enlarged and rugose on the back in fruit, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Arrowleaf Sida,
Sida rhombifolia var. rhombifolia
Calyx ribbed, 5-6mm, puberulent, lobes ovate, per Flora of North America.
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Rose-of-Sharon,
Hibiscus syriacus
5 triangular calyx lobes and 7-10 linear involucral bracts, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Swamp Rosemallow,
Hibiscus moscheutos
A whorl of bracts below the calyx looks like a ring of spider legs, per All About South Carolina Wildflowers (Midgley, 1999).
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Swamp Rosemallow,
Hibiscus moscheutos
Calyx lobes triangular-lanceolate, densely canescent. Involucral bracts linear, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Halberdleaf Rosemallow,
Hibiscus laevis
Calyx lobes broadly triangular, surfaces glabrous. Bractlets linear-subulate, per Flora of North America.
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Halberdleaf Rosemallow,
Hibiscus laevis
Pedicels jointed distally. Calyx divided 1/3-1/2 length, per Flora of North America.
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Savanna Hibiscus,
Hibiscus aculeatus
Calyx lobes triangular-lanceolate, with long stiff pustulate-based trichomes, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Flower-of-an-hour,
Hibiscus trionum
Calyx inflated at maturity; capsule 1.0-1.3 cm long, per Weakley's Flora.
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Flower-of-an-hour,
Hibiscus trionum
Calyx conspicuously veined and hairy, per Wildflowers of Tennessee (Carman, 2005).
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Upland Cotton,
Gossypium hirsutum
An epicalyx of bracts immediately subtends the calyx, per Weakley's Flora (2015).
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Racemose Pinweed,
Lechea racemulosa
Base of fruiting calyx obconic, contrasting in color & texture w rest of calyx, per Weakley's Flora.
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Common Birdsfoot Violet,
Viola pedata var. pedata
Calyx glabrous, ciliate; auricles prominent, entire, not elongating in fruit, per Violets (Violaceae) of the Great Plains and Eastern North America (Ballard).
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Arrowleaf Violet,
Viola sagittata
Calyx glabrous, eciliate, per Violets (Violaceae) of the Great Plains and Eastern North America (Ballard).
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Canada Violet,
Viola canadensis
Calyx glabrous/sparsely hirtellous; auricles short, not elongating in fruit, per Violets (Violaceae) of the Great Plains and Eastern North America (Ballard).
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Walter's Violet,
Viola walteri
Calyx glabrous, eciliate; auricles short and entire, not elongating in fruit, per Violets (Violaceae) of the Great Plains and Eastern North America (Ballard).
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Thorny Olive,
Elaeagnus pungens
Fruit terminated with conspicuous, persistent, prolonged calyx tube, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Autumn-olive,
Elaeagnus umbellata
Calyx tube is slender and longer than the lobes, per Native Shrubs and Woody Vines of the Southeast (Foote & Jones, 1989).
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Red Toothcup,
Ammannia coccinea
Calyx lobes triangular, with acute apices, per Weakley's Flora (2023).
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Purple Loosestrife,
Lythrum salicaria
The hairy calyx has 5 teeth at its apex and several veins along its length, per www.illinoiswildflowers.info.
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Northern Winged Loosestrife,
Lythrum alatum
The corolla has six narrow lobes that spread outward from a tubular calyx, per www.illinoiswildflowers.info.
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Clammy Cuphea,
Cuphea viscosissima
Calyx tube about 3/8" long, ribbed, lopsided. Petals emerge from its summit, per Wildflowers of the Southern Mountains (Smith, 1998).